SHARKS

Sharks

• Sharks have been on earth for more than 450 million years. Older than dinosaurs.

• Sharks belong to the class of fish: Chondrichtyes.

• More than 400 shark species

Habitat

• Generally live in waters from 7,000 feet to 10,000 feet.

• Only come to the surface when searching for food.

Physical Characteristics

• Cartilage skeleton: flexible and lighter tissue for better movement.

• Skin: made up of dentricles which are hard, sharp teeth that help protect from injuries

The Mouth• Can move their upper and lower jaws

• Each type of shark has different shaped teeth depending on what it eats.

• Sharks have many rows of teeth. As teeth wear down or fallout those from the back move into forward slots.

Diet• Most sharks are carnivores. • Live on a diet of fish and sea mammals

(dolphins and seals). • Some sharks will eat other sharks. • Sharks have super senses that help them find

predators. – 2/3 of their brain is dedicated to smell– Can feel vibrations to alert of potential prey

Video: Chances of Getting eaten by a shark

http://science.howstuffworks.com/environmental/life/zoology/marine-life/

shark-diet.htm

Sharks in Nova Scotia

Great White Shark found in Economy, Nova Scotia in the

Bay of Fundy (2011).Near Chester, Nova Scotia

2010

Myth Busters

Video: Punching a sharkPart 1:http://www.youtube.com/watch?v=QTYN5yMAoYM Part 2: http://www.youtube.com/watch?v=uZBjFhj985A

Great White Appetite

http://www.youtube.com/watch?v=IDFQeRhCqbw